<template>
    <div class="cmt-container">
        <h3>发表评论</h3>
        <hr>
        <textarea placeholder="请输入要评论的内容(最多120字)" maxlength="120" v-model="msg"></textarea>

        <mt-button type="primary" size="large" @click="postComment">发表评论</mt-button>
        
        <div class="cmt-list">
            <div class="cmt-item" v-for="(item,i) in commentList" :key="item.index">
                <div class="cmt-title">
                    第{{ i + 1 }}楼&nbsp;&nbsp;用户:{{ item.user_name }}&nbsp;&nbsp;发表时间:{{ item.add_time | dateFormat }}
                </div>
                <div class="cmt-body">
                    {{ item.content == "" ? "此用户评价为空":item.content }}
                </div>
            </div>
        </div>
        <mt-button type="danger" size="large" plain @click="getMore">加载更多</mt-button>
    </div>
</template>
<script>
import { Toast } from "mint-ui"
export default {
    data(){
        return {
            pageIndex : 1,
            commentList : [],
            msg : ""
        }
    },
    props:["id"],
    created(){
        this.getCommentList();
    },
    methods:{
        getCommentList(){  //获取评论
            this.$http.get("api/getcomments/" + this.id + "?pageindex=" + this.pageIndex).then(res=>{
                if(res.body.status === 0){
                    this.commentList = this.commentList.concat(res.body.message);
                    // console.log(res.body.message);
                }else{
                    Toast("获取数据失败")
                }
            })
        },
        getMore(){  //加载更多
                this.pageIndex++;
                this.getCommentList();
        },
        postComment(){
            if(this.msg.trim().length == 0){
                return Toast("评论内容不能为空");
            }
            this.$http.post('api/postcomment/' + this.id,{content:this.msg.trim()}).then(function(res){
                 if(res.body.status === 0){
                     var cmt = {
                         user_name : '匿名用户',
                         add_time : Date.now(),
                         content : this.msg.trim()
                     }
                     this.commentList.unshift(cmt);
                     this.msg = "";
                 }
            })
        }
    }
    
}
</script>
<style lang="scss" scoped>
.cmt-container{
    h3{
        font-size: 18px;
    }
    textarea {
        font-size: 14px;
        height: 85px;
        margin: 0;
    }
    .cmt-list{
        margin: 5px,0;
        .cmt-item{
            font-size: 13px;
            .cmt-title{
                line-height: 30px;
                background-color: #ccc;
            }
            .cmt-body{
                line-height: 35px;
                text-indent: 2em;  //缩进
            }
        }
    }
}
</style>